Dear Forum members,
I have got one question regarding PSV allowable overpressure.
As far as I understand 10 % overpressure can be applied to non fire case and 21% to fire case.
This is obvious to me.
However, the thing is when there are several cases for one PSV including fire case and non-fire case,
let's say, a PSV should cover blocked outlet case, CW failure case and fire case and the fire case is governing case for the PSV then which allowable overpressure can I apply 10% or 21%?
I assume 21% will be applied if a PSV only has one case which is fire case not the other credible cases which are non-fire for a PSV. So 10% overpressure should be applied.
Please let me know if my understanding is correct.
Thanks in advance.
Edited by splendid.ye, 08 November 2016 - 09:08 PM.